Method and system for selecting an operation profile

Abstract

The invention provides a method and system for selecting an operation profile, which belongs to the field of network communication. In order to solve the problem of the selected operation profile being unsuitable for the broad bandwidth and traffic in the prior art, the invention provides a method for selecting an operation profile, comprising: obtaining channel information of a channel; selecting the operation profile according to the channel information and a predetermined selection rule. The invention also provides a system for selecting an operation profile comprising a channel information obtaining module and a profile selecting module. With the technical solution of the invention, it may select a suitable operation profile self-adaptively according to the actual channel condition.

1 . A method for selecting an operation profile comprising:
 obtaining channel information of a channel; and   selecting the operation profile according to the channel information and a predetermined selection rule.   
   
   
       2 . The method for selecting an operation profile of  claim 1 , wherein the step of obtaining channel information comprises:
 computing a signal to noise ratio (SNR) of the channel and obtaining a coding gain according to a used code; and   obtaining upstream/downstream line rates for profiles according to the SNR and the coding gain.   
   
   
       3 . The method for selecting an operation profile of  claim 2 , wherein the step of computing an SNR of the channel comprises:
 computing electrical length of the channel according to reception level and transmission level of a handshake signal, and computing transfer function of the channel according to the electrical length;   computing a transmission signal power spectral density (PSD) according to various band plans and profiles supported by a user side device and an office-end device;   obtaining a noise PSD according to a signal measurement background noise during a handshake procedure; and   computing the SNR according to the transmission signal PSD, the transfer function of the channel and the noise PSD.   
   
   
       4 . The method for selecting an operation profile of  claim 3 , wherein the electrical length is computed by using an average algorithm or a weighted average algorithm. 
   
   
       5 . The method for selecting an operation profile of  claim 1 , wherein the predetermined selection rule comprises: selecting a profile allowing the maximum upstream line rate, or the maximum downstream line rate or the maximum of the sum of the upstream line rate and downstream line rate. 
   
   
       6 . The method for selecting an operation profile of  claim 1 , wherein the predetermined selection rule comprises: selecting a profile allowing the minimum device transmission power, or the maximum line noise margin or the maximum line stability. 
   
   
       7 . A system for selecting an operation module comprising:
 a channel information obtaining module adapted to obtain channel information of a channel;   a profile selecting module adapted to select the operation profile according to the obtained channel information and a predetermined selection rule.   
   
   
       8 . The system for selecting an operation profile of  claim 7 , wherein the channel information obtaining module comprises:
 an SNR computing unit adapted to compute SNR of the channel;   a coding gain obtaining unit adapted to obtain a coding gain according to a used code;   a line rate computing unit adapted to compute bit load that may be carried on each tone according to the SNR and the coding gain, and to compute upstream/downstream line rates according to the bit load that may be carried for whole frequency band.   
   
   
       9 . The system for selecting an operation profile of  claim 8 , wherein the SNR computation unit further comprises:
 a channel transfer function obtaining unit adapted to estimate electrical length of the channel according to reception level and transmission level of a handshake signal, and to compute transfer function of the channel according to the electrical length;   a noise PSD measuring unit adapted to compute a noise PSD according to a signal measurement background noise during a handshake procedure;   a signal PSD computing unit adapted to compute a transmission signal PSD according to various band plans and profiles supported by a modem and an office-end; and   an SNR computing unit adapted to compute the SNR according to the transmission signal PSD, the noise PSD and the transfer function of the channel.   
   
   
       10 . The system for selecting an operation profile of  claim 7 , wherein the predetermined selection rule used by the profile selecting module comprises: selecting a profile allowing the maximum upstream line rate, or the maximum downstream line rate or the maximum sum of the upstream line rate and downstream line rate. 
   
   
       11 . The system for selecting an operation profile of  claim 7 , wherein the predetermined selection rule used by the profile selecting module comprises: selecting a profile allowing the minimum device transmission power, or the maximum line noise margin or the maximum line stability.